Screen or sieve.



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WILLIAM LOID GEORGE, OF HANOVER, NEW MEXICO.

SCREEN OR SIEVE.

Application filed October 4, 1910, Serial No. 585,318.

Specification of Letters Patent.

Patented A11 4, 19114.

Renewed May 15, 1914. Serial No. 838,894.

To all whom it may concern Be it known that I, VVILLIAM L. GEORGE, a citizen of the United States, residing at Hanover, in the county of Grant and State of New Mexico, have invented new and useful Improvements in Screens or Sieves, of which the following is a specification.

The invention relates to a screen, and more particularly to the class of shaking sieves, especially adapted for use in screening rock, stone or the like.

The primary object of the invention is the provision of a sieve of this character in which the bottom thereof is provided with discharge openings through which will rapidly discharge material delivered onto the same during the working of the sieve.

Another object of the invention is the provision of a sieve in which the bottom thereof is bent to provide steps therein, the latter being intersected by discharge openings so that material delivered thereonto will be rapidly distributed, disintegrated and sifted during the working of the screen or sieve.

A still further object of the invention is the provision of a sieve in which the bottom thereof is formed in a step-like manner and contains discharge openings, the latter opening through the steps in the said bottom, so that material delivered into the sieve will not wear the bottom when passing over the steps, yet the said material will be disintegrated and sifted for separation of the finer from the coarser material during the operation of the sieve.

l/Vith these and other objects in view, the invention consists of the construction, com bination and arrangement of parts, as will be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the claim hereunto appended.

In the drawings: Figure 1 is a top plan view of a sieve constructed in accordance with the invention. Fig. 2 is a fragmentary perspective view thereof. Fig. 3 is a sectional view on the line 3-3 of Fig. 1. Fig. 4 is a transverse sectional view on the line 4tl of Figure 1.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to the drawings by numerals, the screen or sieve 2 is made of a sheet of metallic material preferably of rigid metal of any required strength, and is provided with spaced transverse bends 3 and 1 to form a plurality of steps 5, the bends 3 being rounded to present curved edges (5, thus permitting material, such as rock or stone, delivered onto the bottom of the screen or sieve to freely slide thereover without injury to the sheet material, or in other words, without wearing away the said material during the working of the sieve or screen.

The screen is mounted in a suitable frame 7 and is provided in the steps 5 formed therein with diagonally arranged discharge slots 8, the latter intersecting the bends (3 and tapering rcarwardly therefrom. These slots 8 at their ends intersecting the bends 6 in the screen are provided with rounded edges 9 spaced from the bends 4, the adjacent ends of the said slots 8 being in register with each other throughout the length of the screen. ()wing to the particular arrangement of the slots 8, especially in view of the fact that the same intersect the bends 6 in the screen body 2, material passing there over will not wear the rounded edges 6, as the said material will be discharged through the slots 8 when it gravitates from one end of the screen to the other.

It will be noted that the steps in the screen will give the material delivered thereonto a new impetus which carries the material over the screening surface when the same is reciprocated, and also permits it to be hung in a substantially horizontal plane, yet precipitating the material with rapidity for the sifting thereof. It will also be noted that in Figs. 1 to 1 between the rounded edges 9 of the slots 8 and the bonds 1, the vertical walls 16 formed by the steps 5 therein serve to resist material traveling upon the screen 2, thus disintegrating the said material precipitated upon the screen and as the same is discharged through the said slots therein.

That is claimed is:

A sieve body comprising a single piece of material adapted with a series of spaced transverse bends to provide steps dividing the said body into sections, each of the said sections being provided with a plurality of discharge slots intersecting the said steps and having enlarged semi-circular spaced forward edges, said slots tapering rearthe adjacent section throughout the whole wardly therefrom and arranged diagonally length of the body.

and extending in one section in opposite In testimony whereof I aflix my signature directions from the slots of the adjacent in presence of two witnesses.

section, and the said slots of one section WILLIAM LOID GEORGE. having their small ends in register with and Witnesses:

disposed immediately below the said en- JNO. M. SULLY,

larged semi-circular edges of the slots of H. B. PHILLIPS.

Copies of this patent may be obtained 1'01 five cents each, by addressing the Commissioner of Eatents,

Washington, D. C. 

